Great!
It is a brown squasmosa(sp) clam so it is not as light needy as maximas and others. I bought it about6-8 months ago when it was around 3-4". Now it is about 7-8". It has a green strip on the edge of its mantle that is not very prominant in the light I have. But he seems happy. He responds well if you put your hand by him, and he has not moved in a long time.
By the way I have him on the bottom of the tank which is 18" deep.